Nitrogen is a chemical element found in group 15 and period 2 of the periodic table and, in addition, its atomic number is 7, that is, each atom of it has 7 protons in its nucleus. On Earth, which makes up 78% of the atmosphere, is molecular nitrogen, which is just two nitrogen atoms joined together.
Molecular nitrogen, is a colorless, odorless and tasteless gas, very abundant in the universe, in fact, is the seventh most abundant element in the entire Solas System and the Milky Way. On the other hand, liquid nitrogen is nothing but pure nitrogen in a liquid state. It is colorless and odorless, has a temperature of about -195.8° C and a triple point density of about 0.807 g/ml. It is produced through the fractional distillation of liquid air. It is very common in industry, in laboratories, where it is used as a refrigerant, and in cryogenics, among others.